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US 6,208,837 B1Granted
Selective calling/receiving device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNozomi Koh, Atsuhiko Hashigaya, Hidenori Suzuki
Life of this patent
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Abstract
The result of detection performed by a receiving electric-field level detection circuit 8 and the result of detection performed by an automatic gain setting circuit 9 are fed back to a timing signal generation circuit 10 which controls a pre-heat time of a selective calling/receiving device. As a result, the pre-heat time can be changed according to the state of propagation of radio waves, and hence the life of battery of the calling/receiving device can be increased.
Claims5
A selective calling/receiving device comprising:
- a timing signal generation circuit for determining the control timing of intermittent receiving operations while ensuring a pre-heat time to render the device active by application of power to the device prior to a signal to be received, and
- a receiving electric-field level detection circuit for detecting a receiving electric-field level,
- wherein the timing signal generation circuit variably controls the pre-heat time so as to correspond to the receiving electric-field level detected by the receiving electric-field level detection circuit.
Dependencies are inferred from the claim text.